Post-operative hearing loss is a very poorly understood complication in the medical field in general and in the Anesthesiology practice more specifically. This has been observed past three decades and yet, it still is a mystery and unresolved medical condition. Senso-neural hearing loss (SNHL) results in temporary deafness as a side-effect of a puncture during spinal (subarachnoid) anesthesia. Although it is also observed after general anesthesia, but the numbers are much less. In the present study, we report a case of 48 year old man who underwent a surgery for anal fistula incision with spinal anesthesia and complained about the hearing inability in both the ears (bilateral SNHL) started few hours after the surgery. His symptoms improved over a few days’ time with a conservative approach (rest, hydration and increased caffeine intake). There have been other reports on permanent type of hearing loss. Even though in a majority of cases, the patients recover, considering the threats from the minority, we believe that it is the responsibility of the medical staff to be aware of the patients’ condition before undertaking such surgeries and anesthesia